package com.ww.myblog.web.admin;

import com.ww.myblog.po.Tag;
import com.ww.myblog.service.TagService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.validation.Valid;

@Controller
@RequestMapping("/admin")
public class TagController {

    @Autowired
    private TagService tagService;

    @GetMapping("/tags")
    public String tags(@PageableDefault(size = 10,sort = {"id"},direction = Sort.Direction.ASC) Pageable pageable,
                        Model model){
        // 对类型进行分页处理，并用model返回到前端
        model.addAttribute("page",tagService.listTag(pageable));
        return "admin/tags";
    }

    @GetMapping("/tags/input")
    public String input(Model model){
        // 访问新增标签页面
        model.addAttribute("tag",new Tag());
        return "admin/tags-release";
    }

    @GetMapping("/tags/{id}/input")
    public String editInput(@PathVariable Long id, Model model){
        // 修改标签
        model.addAttribute("tag",tagService.getTag(id));
        return "admin/tags-release";
    }

    @PostMapping("/tags")
    public String post(@Valid Tag tag, BindingResult result, RedirectAttributes attributes){
        // 根据前端post过来的form表单进行添加类型
        Tag t1 = tagService.getTagByName(tag.getName());
        if (t1 != null) {
            result.rejectValue("name","nameError","不能添加重复的分类");
        }
        // 后端验证是否出错(名称为空或者名称重复)
        if (result.hasErrors()) {
            return "admin/tags-release";
        }

        Tag t = tagService.saveTag(tag);
        attributes.addFlashAttribute("message", "添加成功");
        return "redirect:/admin/tags";
    }

    @PostMapping("/tags/{id}")
    public String editPost(@Valid Tag tag, BindingResult result,@PathVariable Long id, RedirectAttributes attributes){
        // 修改类型
        // 后端验证是否出错(名称为空或者名称重复)
        if (result.hasErrors()) {
            return "admin/tags-release";
        }

        Tag t = tagService.updateTag(id,tag);
        attributes.addFlashAttribute("message", "修改成功");
        return "redirect:/admin/tags";
    }

    @GetMapping("/tags/{id}/delete")
    public String delete(@PathVariable Long id,RedirectAttributes attributes){
        tagService.deleteTag(id);
        attributes.addFlashAttribute("message","删除成功");
        return "redirect:/admin/tags";
    }
}
